Ointmentary. Rome, 1st century AD. Blown glass. Excellent state of preservation. With adherences. With old collection label. Provenance: private collection. Attached certificate issued in 1979. Measurements: 15.5 cm (height). This ointment has a high neck ending in a wide, flat lip, as well as a narrowing in its connection with the body, which is utilitarian in concept in order to be able to graduate the exit of the essential side. Its body is globular. The use of glass began to become widespread from the 1st century AD, after the discovery of the blowing technique around 40 BC, in the eastern part of the Mediterranean coast. This technique was a major revolution and spread rapidly. Blown glass offered great advantages over other materials because it did not change the taste of the food it contained and was more impermeable than terracotta. In addition, the blowing technique made it possible to produce pieces in a wide variety of shapes and sizes, and also to produce them more quickly. On the other hand, glass pieces were easier to clean, so it soon became the favourite material for domestic use.